Project PRIME (Programmed Re-Entry Into Mainstream Education) is concerned with evaluating the effectiveness of programs that aim at integration of handicapped children into regular classrooms. The main goals of the project are to determine which handicapped children can benefit from integration and under which conditions would it prove the most successful. Also, a considered area of concern is whether those factors which lead to social, emotional, and academic growth in normal children will have the same effects on handicapped children. This study was implemented in the Texas school districts that were appropriate for the needs of the study. Eleven hundred handicapped children were randomly picked from grades 3-5 ensuring diversity of race, socioeconomic status, and type of handicap. Only emotionally disturbed, educable mentally retarded, and language/learning disabled pupils who had been previously placed in self-contained classrooms were used in this study. All methods of data collection and all instruments used in gathering information from school administrators and teachers are included in the appendices of this document. (Author/DEP)